I've seen new shrimp not acclimate well and become almost comatose. Alive, but not moving at all. I gotta believe that the snail got him that way. Otherwise, i'd have to believe snails have an extra few gears they don't show humans,
and your stupid snail let the cat out of the bag for all the snails in the world!
Shrimp move really fast. Too bad you couldn't have gotten a little video clip of dinner time, sped it up on the replay, and showed it that way. Snail moving in those extra gears choping down. Shrimp still alive at first. That would've been a hoot.